Milling-machine



A. ARTHUR.

MILLING MACHINE APPLICATION -FILED MAR. Il, |918. 1,330,971. PatentedFeb.17,1920.

3 SHEETS-SHEEI I.

ifm/m A. ARTHUR.

MILLING MACHINE.

` APPLICAIION FILED MAR. Il I9I8. 1,330,971

/fLIL Patented Feb. 17, 1920.

3 SHEETS-SHEEI 2.

A. ARTHUR. MILLING MACHINE.

APPLICATION FILD MAR. Il. 191B. 1,330,971

Patented Feb; 17,1920.

3 SHEETS-SHEET 3- ALBERT ARTHUR, OF CLEVELAND, OHIO.

MILLING-MACHINE,

Specification of Letters Patent.'

Patented Feb. 17, 1920.

Original applmtionV filed August 20, 1915, Serial No. 46,500. Dividedand this applicaton led March 11, 1918. Serial No. 221,647.

T 0 all whomt may concern: f

Be it known that I, ALBERT ARTHUR, a citizen of the United States,residing at Cleveland, in the county 0f Cuyahoga and State ofy Ohio,have invented a certain new and useful Improvement in Milling-Machines,of which the following is a full, clear, and exactA description.

This invention relates to. certain improvements in milling machines,`su-ch as die sinking machines, and this application is a division of myprior application original Serial .No. 46,500, filedAugust 20, 1915,renewed June 11, 1917, renewal Serial No. 174,164.

In my prior or parent application above referred to, I disclose a diesinking machine or milling machine ofthe turret type, having -twocutters, either. of which can be brought to cutting position withrespect to the work supported in the chuck or work holder, the twocutters being preferably in the nature of a roughingout and Afinishingcutter, respectively.

The cutter to whichv the claimsof my parent lapplicationare devotedparticularly, Ais designed to lbe mounted on the lower end of avertically rotating spindle, fwhich is s0 mounted and iactuated that asthe spindle is Y loweredl it can be caused to -travellaterally in such amanner that the point ofthe cutter will be *causedY to travel in an arcof a circle rather than in a straight vertical line.

The second cutter which with its associated mechanism constitutes thesubject inatter of this application, 'is a rotating i cutter, preferablyprovided with peripheral and lateralv cutting edges, this cutter beingpreferably driven through Ia gear or pinion engagingthe peripheralcutting teeth or edges,

and being mounted and driven so that it will do very effective work, and`can be inserted well down into the recess of a. die block, the mountingof the cutter being such that the workman can observe-the cutting actionwithout having his view materially obstructed by the part or partswhich' support or actuate the cutter.

The invention may be briefly summarized as consisting in certain noveldetailsof construction and combinations and arrangements of-parts whichwill be described in the specification and set forth in the lappendedvclaims.

In the accompanying sheets of drawings,

Figure .1 is a` side .elevation with parts in section of so much of themachine of the prior application as is necessary to give a clearunderstanding `of the present invention; Fig. 2 is a top plan view ofthe vertically adjustable arni which carries the cutter and the majorportion of the driving mechanism; Fig., 3 is a vview of the cutter vandassociated mechanism looking toward Vthe left of Fig. 1; Fig. 4 is aside view of -ing provided with peripheral cutting and drivingteeth 12a(see particularly Figs. 4 and 5), and laterally cutting edges or teeth12b. This cutter with its associated driving and supporting parts iscarried by an arm 13 which is mounted for vertical movement along aguideway 14 0f the upper part 11 of the column land may be adjustedvertically through the medium of a hand wheel 15. -lWhile thespeciiicdriving mechanism here shown is not essential to my invention,par; ticularly that part of the driving mecha.- -nism which deliverspower to the gears which directly drive the cutter, I have shown in thiscase, the same driving method which is disclosed in my parentapplication.

ley 20 carried by a vertical shaft 21.1 This shaft isprovided at itslower end with a bevel gear 22 which meshes with a bevel gear 23 fixedto a shaft 24which is carried by the laterally extending cuttersupporting 'arm 13. This 'shaft 24 drives a worm gear 25 which isconnected tothe shaft' by a tweeii two bearings 26 on an arm 27 (seeFig. 3) which is secured to a sliding block 28 adjustable inwardly Iandoutwardly, or toward and from the column by a hand Awheel 29, the blockbeing movable in a guideway 30 rigidly supported by, and in fact,forming a part of the arm 13.

The worin 25 drives a worin gear 31 fixed to a shaft 32 shown by dottedlines in Figs. 1, 2 and 3, this shaft being mounted in the sliding block28 and being provided with a gear 33 which is in the plane of the cutter12, but above and at the rear of the same. This gear 33 drives a gear 34which is located diagonally downward and forward of the gear 33, and issupported on a pin or shaft 35, likewise carried by' the block 28. Theteeth of the gear 34 engage the peripheral cutting teeth 12n of thecutter 12 and thus drive the latter. It will be noted that the cutter isbeneath and forward of the driving gear 34, and that the application ofthe `drive is not diametrically opposite the lower part of the cutterwhere the cutting is done when a recess is being cut in a die block.

The cutter 12 is provided on opposite sides with conical bearingopenings 12, and it is supported in working position and iii drivingrelation with the gear 34 by two centers 36 which are not axiallyarranged with re- Vspect to the cutter but extend downwardly andinwardly toward the same as best shown in Fig. 5, and at their innerends having conical bearing portions 36a. These centers are supported intwo arms 37 which project downwardly from, and are integral with a pairof sliding blocks 38 which are mounted in guideways on the front of thearm 13, and

- may be moved back and forthl toward and y from each other to vary thedistance be tween them so as to accommodate cutters of` differentwidths. These blocks may be clamped in any adjusted position by clampingbolts 39, which will be loosened when it is desired to shift the blocks38, and will ,be

tightened when the blocks are the right distance apart.

vantage in various types of milling machines ris especially advantageousin a milling mach ine used for die sinkingvpurposes for not only is thecutter wholly beneath the supporting arm 13, but the diagonal supportingarms 37 and the diagonal centers 36V allow the cutter to be lowered o rto cut its way a considerable distance into the recess of a die block,and the operator can by looking down p One of the blocks 38 is 'here l lshownadjustable through the medium of a .hand wheel 40 which may,however, be

from the side of the cutter observe the cutting action without havinghis view obstructed Ato an undesirable extent by the cutter supportingdevices. This also is of particular utility in die sinking where thecutter is obliged to work in a recess of a die block,

The cutter can be raised and lowered by turning the hand wheel 15, andif Vit is desired to change the cutter, substituting one which is wideror of greater diameter, this is possible for the reason that the blockssup porting the centers 38 can be moved toward and from each other, andthe block carrying the driving gears 33 and 34 can be moved inward andoutward by adjusting the hand wheel 29 toY vary the distance between theaxis of the cutter and the axisof the gear 34 which directly drives thecutter. j Not only isthe cutter mounted so that effective work can bedone `in the recess of a die block with the cutter cutting deeply andwithout the view of the operator being seriously obstructed, but afurther advantage resides in the way that the cutter is' driven.Assuming that .the lower part of the cutter is the cutting part, thepoint of vapplication of power, or the turning effort on the cutter isnot diametrically opposite the cutting part, but is to the rear andabove the latter. In consequence of this there does not exist thepossibility of breakage of the cutter or destruction of the cuttermounting that would exist if the turning effort were applieddiainetrically opposite from the cut'- tiiig portion, when the greatestpossible leverage is exerted on the cutting part with a tendency tocause the cutter to ride up on, or force itself over the work. Y Y

It will be understood that certain changes can be made in details ofconstruction and arrangement, and I therefore do not desire to beconfined to the precise details shown, but aim in my claims to `coverall modifications which do not involve a departure from the spirit andscope ofjmy invention in its broadest aspects. Y

Having described my invention, I claim:

1. In a machine of thev character described, a cutter supporting arm, vacutter carried byV and extending beneath the arm, and amounting carriedby said arm,

f tates and provided with-diagonally disposed supporting shanks, meanscarried Aby the arm engaging the diagonally disposed portions of thecenters,- and means for driving said cutter. A v

V2. In a machine of the character described, a cutter supporting'member,a -cutter having peripheralfteeth, -a -mounting for the cutter rby'whichthe cutter is supported beneath said supportingY member,- said lmountingcomprising armsprojecting downwardly from said supporting member andprovided with diagonally disposed center receiving portions, and a pairof diagonally disposed, downwardly inclined centers hav ing their innerends rotatably supporting said cutter and carried by said portions ofthe arms, and means for driving the cutter.

3. In a machine of the character described, a cutter supporting arm, apair of blocks at the oute end of the arm and movable toward and `fromeach other, said blocks having diagonally disposed center receivingportions, a pair of downwardly inclined, diagonally disposed `centerssupported by said portions or' the blocks, and a cutter rotatablysupported on the inner ends of said centers. Y

4. In a machine of the character described, a cutter supporting arm, apair of blocks at the outer end of the arm and movable toward and Jfromeach other, said blocks having downwardly and inwardly projecting lowerends, a pair of centers supported by the lower ends of said blocks, acutter rotatably .supported on the inner ends of said centers, saidcutter having peripheral teeth, and a gear carried by said arm andengaging said teeth to drive the cutter.

5. In a machine of the character described, a cutter supporting arm, apair of blocks at the outer end or' said arm movable toward and fromeach other, arms projecting downwardly and inwardly from said blocks, apair of centers supported by the lower portions of said arms, a cutterhaving peripheral teeth supported on the inner lower ends of saidcenters, and a gea1 engaging said peripheral teeth to drive the same. Y

6. ln a machine of the character described, a cutter support, a cuttersupported from said support beneath the same, said support havingdownwardly inclined centers with tapered inner ends engaged by thecutter, said cutter having peripheral cutting and driving teeth, and agear carried by said support in driving relationship with the teeth ofthe cutter, said gear having its axis above and to the rear of the axisof the cutter.

7. In a machine of the character described, a cutter supporting arm, arotary cutter having peripheral driving and cutting teeth supported atthe front ot and beneath said arm, a gear for driving said cutter indriving relationship with the peripheral teeth of the cutter, the axisof said gear being to the rear and above the axis of the cutter,and-means whereby said gear may be moved toward and from the axis of thecutter.

8. ln a machine of the character described, a cutter supporting arm, acutter having peripheral driving and cutting teeth supported at thelower front end of the arm` a block slidable back and forth along saidarm, and gears for driving the cutter carried by said block.

9. ln a machine of the character described, a cutter supporting arm, acutter having peripheral driving and cutting teeth supported at thelower front end of the arm, a block slidable back and forth along saidarm, and gears for driving the cutter carried by said block, one of saidgears being in driving relationship with the peripheral teeth of thecutter and hc ving its axis above and to the rear of the axis of thecutter.

In testimony whereof I hereunto affix my signature.

ALBERT ARTHUR.

